mineral

Banded Agate

Cryptocrystalline Quartz (SiO2)

AI-generated identification · may be incorrect

Hardness: 6.5-7 (Mohs scale), Color: White, cream, and yellow banding, Luster: Waxy to vitreous, Crystal System: Trigonal (microcrystalline), Cleavage: None/Conchoidal fracture, Specific Gravity: 2.58-2.64

Hardness: 6

Identified July 18, 2026More mineral →

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Physical properties

Formation & geological history

Formed primarily in volcanic or metamorphic environments when silica-rich groundwater fills cavities (vesicles) in lava or other rock. The characteristic banding is created by successive layers of silica deposition over many years.

Uses & applications

Commonly used for lapidary work, jewelry, stone carvings, bookends, and as healing stones in metaphysical practices. Industrially used for mortar and pestle sets because of its hardness.

Geological facts

The name 'Agate' originates from the Achates River in Sicily. Each agate specimen is unique due to the specific mineral impurities present during its formation cycle.

Field identification & locations

Identify in the field by looking for translucent edges, waxy luster, and concentric banding. Commonly found in riverbeds, gravel pits, and near volcanic regions like the Lake Superior area and Western United States.